Command Line Interface for Lodestar

This helps start Beacon Node, Validator ... in other packages.

Lodecli

We have an experimental new CLI called lodecli which currently provides a subset of the lodestar CLI functionality.

./bin/lodecli beacon init - this will write a configuration and network identity to disk, by default ./.lodecli./bin/lodecli beacon run - this will run a beacon node using a configuration from disk, by default ./.lodecli